Hinged back for brake-shoes.



J. ALLA R.

` HINGED B FOB B SHOES.

APPLICATION FILED Amm, ma.

, 1,1 17,366. Btented Nov. 17, 1914.

4 SHEETS-SHEET 1.

ATTO/MIE Y J. D. GALLAGHER. HINGED BACK FOR BRAKE SHOES. APPIoATIoNFILED Amm, 1913.

1 l l 7,366. Patented Nov. 17, 1914.

4 slums-SHEET 2.

1 -Tri' E' 2.7 8 P1 0 J. D. GALLAGHER.

HINGBD BACK PoR BRAKE SHOES.

` APPLICATION FILIED AUG. 9, 1913. 1,1 17,366.

Patented Nov. 17, 1914.

/VESSES www ATTORNEY UNITED STATES PATENT ortica.

JOSEPH D. GALLAGHER, 0F GLEN RIDGE, NEW JERSEY, ASSIGNOR TO AMERICANBRAKE SHOE,& FOUNDRY COMPANY, 0E MAHWAH, NEW JERSEY, A CORPORATION OFNEW JERSEY.

HINGED BACK FOR BRAKE-SHOES.

resident of Glen Ridge, in the county of Essex and State of New Jersey,have made and invented certain new and useful Improvements in HingedBacks for Brake- Shoes, of which the following is a specifi cation.

My invention relates to brake shoes de.- signed for use upon railwayvehicles, and particularly to that. kind or type of brake shoes commonlyknown and referred to as an interlocking shoe, and from the use of whichno waste material or scrap results; this end being attained by securinga partially worn-out shoe in front of an unworn shoe, whereupon thepartially worn-out shoe will be. completely worn away. Thereafter, andwhen the unworn shoe above referred to shall have been partially wornaway, it in turn is placed in front of and secured to the face ofanother unworn shoe and completely worn away, and so on indefinitely,each partiall worn shoe being thus in turn secured to tie face of anunworn shoe and entirely worn away, there being no waste of material ofthe body or fractional member of ythe shoe.

The objects of my invention are to provide a brake shoe of the typeabove referred to which shall be simple in construction and in which theworn and unworn sections, which form the body ortion, may be mdrereadily assembled, and held together more securely, than has heretoforecommonly 'been the case; to provide a brake shoe in ywhich the liabilityof the worn and unworn sections to become separated when the shoe is inservice will be reduced to a minimum; to provide a shoe of this typewith a back of a tough material, such as wrought iron or steel, tosupport the body portion of cast metal and capable of repeated use, andto otherwise improve upon and increase the efficiency of brake shoes ofthe type above referred to.

With the above and other objects in view, my invention consists in theimproved brake shoe, and back therefor, illustrated in the accompanyingdrawings and hereinafter de,

4,scribed and claimed, and in such variations and modification thereofas will be obvious i to those skilled vin the art to which my inventionrelates.

Specification of Letters Patent.

Application tiled August 9, 1913.

Patented Nov. 17, 1914.

Serial No. 783,908. y

lembodiment of my invention is illustrated,

Figure 1 is a view showing my improved brake shoe back in perspective,the same comprising two sections pivotally connected with one another-at the middle portion; F1g. 2 is a View showin-g the sectional bodyportion of my improved brake shoe in perspective; Fig. 3 is a viewillustrating the position in which the sections of the back are placedpreparatory to assembling the back and body of the shoe: Fig. 4 is aview mainly in section, showing the shoe supported from a brake head(shown in dotted linesl by a suitable key; Fig. 5 is a View showing acomplete brake shoe, comprising alback and two body portions secured toone another to be worn away in succession: Fig. 6 is a view showing thesame in plan;Y F 7 1s a view showing-a section upon a. transverse plane`indicated by the line 7-7, Fig. 6; Fig. 8 is a view showing a sectionupon a transverse plane indicated by the line 8 8, Fig. 5;.Fig. 9 is afragmentary view showing another form of pivotal or hinge connectionbetween the sections of the back; Fig. 10 is a view showing a sectionupon a plane indicated by the line 10-`10, Fig. 9; Fig. 11 isa viewshowing the connection shown in Figs. 9 and 1 0 in side elevation; Fig.12 is a View showing a modified form of the sectional body portion of myimproved shoe in perspective; Fig. 13 is a view showing a longitudinalsection of the same assembled with fthe back; Fig. 14 is a view showinga section upon a transverse lplane indicated by the line lll- 14, Fig.13; Fig. 15 is a perspective view showing my improved brake shoes backequipped with another form of pivotal connection between the sectionsthereof; Fig. 16 is a similar view showing the two parts of the backdetached from one another; Fig.,17 is a view showing the same in sideelevation; Fig. 18 is a view showing the form of back illustrated inFigs. 15 to 17 assembled with a sectional body portion and the shoe thusproduced secured to a brake head (shown sections, each extendingtransversely to and throughout the width of the shoe, and whichsections, collectively, form the body portion of my improved shoe,although at certain times when the, shoe is in use, as will hereinafterappear, and as shown in Figs. 5, 7 and 8, two sections are arrangedl oneupon the other, throughout the length of the shoe, in which instance thebody portion of the shoe might properly berdescribed as made up ot twosuperposed sets of sections Alike the sections 20, each set extendingthroughout the length or the shoe. .'llhe sections 20 are commonly madefrom cast iron, of a quality and composition selected with reference tolong service as well as a maximum of trictional or retarding action whenthe shoe is applied to a car wheel.

rllhe drawings illustrate brake shoes in which the body portion is madeup of two sections, or of our sections when two series of sections aresuperposed one upon the other, although the body portion of my improvedbrake shoe may obviously be made be placed in front of unworn sectionsand seup ot any number of sections greater than one. The sections whichcollectively form the body portion of my improved brake shoe are soformed that worn sections may cured thereto, so that when the shoe thusproduced is used, the partiallywornout sections will be worn entirelyaway; from which it tolle-ws that no scrap or waste material will resultwhen the shoe is used. rllhus, referring to Figs. 5, 7 and 8, the lowersections 20 have been partially worn out in service, and are shown-assecured to the front or wearing faces of the upper unworn sections 20..-When the shoe thus formed is used the lower sections 2O will be firstentirely worn away, after which lthe upper unworn sections will'be wornas thin as practicable, whereupon they will be removed from' thesupporting bach of the shoe and placed in front of other unworn sectionsto be in their turn entirely. worn out, and so on indefinitely. 1

rlthe means whereby it is made possible to secure partially worn-outsections to the :t'ront or wearing faceof unworn' sections are shown ascomprising a longitudinally extending lug 21 located upon the rear faceof each section 20, and a recess 22 corresponding in size and form withsaidl lug and located upon the front face of said section. The lug andrecess are preferably made tape ring, and undercut or dovetailed, asshown in the drawings, from'which it will be understood that vthe lugupon the back of a partially worn-out section may be placed within therecess upon vthe face of an unworn section, and the sections movedlongitudinally relative to one another to bring them into a position inwhich one section overlies the other as shown in lliig. 5,

nnaeee whereupon the worn section will be secured to the :tace of theunworn section. The larger .ends ot the tapering lugs and recesses lieat the center of the shoe, in the preferred form oi my inventionillustrated, so that longitudinal movement. of the partially wornsections .will be prevented, as

said bak being made up of a plurality of sections ypivotally connectedwith one another in the embodiment or' my invention illustrated.rlhe-bach therefore' serves as a member through which the body of theshoe is supported from a brake head or equivalentsupporting element,which back, bein of a tough and strong material, is we suited towithstand the strains encountered when the shoe is in service; and thefact that the sections of the back fare-detachable troni the sectionalbody portion ot the shoe permits a single back to be used repeatedly.rl`he supporting back above referred to is shown as made up oftwo'similar sections 23 having. each two sides 24 so shaped as toprovide a tapering opening between them within whichthe tapering lugs 2lupon the backs ot the sections 2O lie when the shoe is assembled. Thesesides are beveled. upon their inner edges to fit the beveled or undercutsides of the lugs 2l, and are in contact with said lugs throughoutsubstantially their entire length, thus providing an extensive andstrong connection between the body section and the sections of the back.rlhe inner of the body of the shoe to thereby provide av centrallylocated key lug 25, through which the shoe may besecured to a brakehead, or equivalent support, as by means of the key 26, said sectionsbeing pivotally connected by a centrally located hinge connection at 27.rlhe portion of metal cut free in providing the holes 28, through whichthe key 26 extends, is preferably bent under the top of the attachinglug 25, as shown at 29, to thereby provide an extending bearing for thekey 26 and prevent the hinge or pivotal connection between the sectionsfrom being injured when the shoe is in use. The end portions oi the backsections are also slitted and shaped .to :form thrust receiving endstops or lugs 30 and a central 4stop or lugV erly supported and held inposition when'the same 1s secured to the standard form of brake head.

In the form of pivotal connection shown in Figs. 9 to 11 the bearings 29above referred to are omitted, and the ycentral porv tion of the pin ofthe hinge connection 41 which lies above the securing key when the shoeis secured to a brake head is cut away as shown at 42 to thereby preventthe key from bearingdirectly upon an element of the hinge or pivotalconnection, which, if permitted, might cause injur to the latter.

Figs. 12 to 14 of the drawing illustrate a form of sectional body inwhich a longitudinally extendin lug 32, similar to the lug 21, 1semploye but which lug is rovided with an upwardly extending hoo 33 atits outer end; this hooklies above the back of the shoe when assembledtherewith and takes the place of the lug 31 hereinbefore referred to,side end stops or lugs 34 being provided by bending the end of thesection of the back upward, it being unnecessary to slit .the outer endsof the back sections in this form of shoe, as the hook 33 forms thecentral end sto or lug. The recess 35 in the front face oi) the bodysections in this form of ymy improved brake shoe is enlarged to receivethe hook 33 of a partially wornout section, as shown at 36, and

provided 4with a transverse ledge 37 with which the hook of a lwornsection engages, thus great1y`strengthening the connection between theunworn and wornfsections at the ends of the shoe.

In Figs. 15 to 19 I have shown my improved brake shoe as `provided witha back having a different form of pivotal connecthe sections assembledwith the b ack by placing the top 1u g of the unworn sections between4tion between its sections than the :forms of connection hereinbeforedescribed; the body sections being of theforzf'. first describedalthough it is obvious that either of the forms of body sections hereinspecifically referred to may be used. In this form of back theupwardlybent portion 38 of one of the back sections, which portion formsa part of the key lug, is provided with hooks 39 at itsfree end; and theupwardly bent portion of the other section 1s recessed as shown at 43 toprovide lugs 40 'with which said hooks may engage in the manner shown inthe drawings. It will be understood, however, that? my inventionincludes any form of pivotal connection'between the sections of thesupporting back.

Inassembling the parts hereinbefore referred to the worn and unwornsections are rst assembled, after which the hinged back is openedsomewhat as shown in Flg. 3, and

the sides of the back and moving them outwardly from the center of theshoe; or,

'.as will be understood, the unworn sections may be first assembled withthe back and the worn sections then fput in place. After the back andsections o the body are assembled, the inner ends of the severalsections contact with one another as the hinged back is swung into theposition it takes when the shoe is'in use, thereb holding the bodysections and back toget er.

Having thus described and explained my invention, I claim and desire tosecure by Letters Patent:

1. A back for a brake shoe comprising a plurality of sections pivotallyconnected at their adjacent edges.

2. A back for a brake shoeI comprising a plurality of sections theadjacent ends of which extend upward to thereby provide a key. lug andwhich ends are pivotally connected with one another.

3. A back for a brake shoe comprising two sections the adjacent ends ofwhich eX- tend upward to thereby provide a kpy lu and which ends arepivotally connecte with one another, and the remote ends of whichsections are provided with upwardly extending end stops.

4.` A back for a brake shoe comprising twosections having each means forenga ing a securing lug of a section of the bo y of a sectiona brakeshoe and the adjacent ends of which back sections extend upward tothereby provide a key lug, and which ends are pivotally connected,withone another.

5. A back for a brake shoe divided transversely about the middle of itslength, the sections being connected at their adjacent edges.

6. A back for a brake shoe provided with a key lug and dividedtransversely at about the middle of said key lug, the adjacent ed es ofthe sections being connected.

ros

' A back for'a brake shoe provided with .versely at about the middleof'its length,

the adjacent ends -of the sections being hinged togetherand formed intoa key lug. Signed at New York, borough of Man f hatten, in the county ofNew -York and State of New York, thisl 31st day of July,

1913.` JOSEPH D. GALLAGHER. Witnesses: i Y

MARI B. JUSTICE, ANNA V. WALSH.

